The former home of two horror filmmakers is famous for its baffling design: secret passages, stairways that lead nowhere, and doors that open onto dangerous surprises. Now glowing-eyed ghosts are driving visitors away, and Mystery Inc. has come to investigate. Guide Scooby-Doo and the gang as they explore the mansion’s twisting routes and decide which clues to follow. The house was built to unsettle people, but someone or something may be making its frightening reputation all too real.